third_party/talloc/pytalloc.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    Python/Talloc glue
   4    Copyright (C) Jelmer Vernooij <jelmer@samba.org> 2008
   5
   6    This program is free software; you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 3 of the License, or
   9    (at your option) any later version.
  10
  11    This program is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  18 */
  19
  20 #include "replace.h"
  21 #include <talloc.h>
  22 #include <pytalloc.h>
  23
  24 /**
  25  * Simple dealloc for talloc-wrapping PyObjects
  26  */
  27 void py_talloc_dealloc(PyObject* self)
  28 {
  29         py_talloc_Object *obj = (py_talloc_Object *)self;
  30         talloc_free(obj->talloc_ctx);
  31         obj->talloc_ctx = NULL;
  32         self->ob_type->tp_free(self);
  33 }
  34
  35 /**
  36  * Import an existing talloc pointer into a Python object.
  37  */
  38 PyObject *py_talloc_steal_ex(PyTypeObject *py_type, TALLOC_CTX *mem_ctx,
  39                                                    void *ptr)
  40 {
  41         py_talloc_Object *ret = (py_talloc_Object *)py_type->tp_alloc(py_type, 0);
  42         ret->talloc_ctx = talloc_new(NULL);
  43         if (ret->talloc_ctx == NULL) {
  44                 return NULL;
  45         }
  46         if (talloc_steal(ret->talloc_ctx, mem_ctx) == NULL) {
  47                 return NULL;
  48         }
  49         ret->ptr = ptr;
  50         return (PyObject *)ret;
  51 }
  52
  53
  54 /**
  55  * Import an existing talloc pointer into a Python object, leaving the
  56  * original parent, and creating a reference to the object in the python
  57  * object
  58  */
  59 PyObject *py_talloc_reference_ex(PyTypeObject *py_type, TALLOC_CTX *mem_ctx, void *ptr)
  60 {
  61         py_talloc_Object *ret = (py_talloc_Object *)py_type->tp_alloc(py_type, 0);
  62         ret->talloc_ctx = talloc_new(NULL);
  63         if (ret->talloc_ctx == NULL) {
  64                 return NULL;
  65         }
  66         if (talloc_reference(ret->talloc_ctx, mem_ctx) == NULL) {
  67                 return NULL;
  68         }
  69         ret->ptr = ptr;
  70         return (PyObject *)ret;
  71 }
  72
  73 /**
  74  * Default (but slightly more useful than the default) implementation of Repr().
  75  */
  76 PyObject *py_talloc_default_repr(PyObject *obj)
  77 {
  78         py_talloc_Object *talloc_obj = (py_talloc_Object *)obj;
  79         PyTypeObject *type = (PyTypeObject*)PyObject_Type(obj);
  80
  81         return PyString_FromFormat("<%s talloc object at 0x%p>",
  82                                    type->tp_name, talloc_obj->ptr);
  83 }
  84
  85 static void py_cobject_talloc_free(void *ptr)
  86 {
  87         talloc_free(ptr);
  88 }
  89
  90 PyObject *PyCObject_FromTallocPtr(void *ptr)
  91 {
  92         return PyCObject_FromVoidPtr(ptr, py_cobject_talloc_free);
  93 }